CN102420753A - Automatic protection switching (APS) protocol state transition method and device - Google Patents
Automatic protection switching (APS) protocol state transition method and device Download PDFInfo
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- CN102420753A CN102420753A CN2011103841861A CN201110384186A CN102420753A CN 102420753 A CN102420753 A CN 102420753A CN 2011103841861 A CN2011103841861 A CN 2011103841861A CN 201110384186 A CN201110384186 A CN 201110384186A CN 102420753 A CN102420753 A CN 102420753A
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Abstract
The invention discloses an automatic protection switching (APS) protocol state transition method and device. The method comprises the steps of: receiving an APS message of an opposite end device in an APS protocol; obtaining an APS state of the opposite end device from information carried in the APS message; obtaining the APS state of a local device; and when the APS state of the local device is a no request (NR) state and a requested signal of the NR state is an invalid signal, transiting the APS state of the local device from the NR state to the DNR (No Not Revert) state. The invention can be used for perfecting and implementing the transition condition of the NR state in the APS protocol and transiting the NR state into the DNR state aiming at the special condition that an NR state device receives the APS message of a DNR state device so that two end devices have consistent states, ensures data streams of the two end devices of the APS protocol are not interrupted, and ensures normal communication.
Description
Technical field
The present invention relates to communication technical field, specially refer to APS APS transferring protocol state method and device thereof.
Background technology
APS (Automatic Protection Switching, APS) agreement is a kind of agreement that realizes APS.The implementation method of APS protocol is simple; Switch fast, his basic principle is: when point-to-point or put when having mulitpath between the multiple spot, can form backup between the mulitpath; The path definition that is using is operating path; Other backup paths are defined as the protection path, after the operating path inefficacy that initial selection is used, switch to fast on other protection paths.
APS agreement terminal device can be sent the APS protocol massages each other; The APS state of opposite equip. can be communicated to local device through protocol massages; Local device can consult to confirm the state of self according to the APS state in the APS message, decides through self APS state and selects which paths.The APS state of APS agreement regulation has 11 kinds at present, and has stipulated the height of priority and the rule of state transition.Stipulate that in the APS agreement when the priority of status of local device was lower than the priority of status of APS agreement opposite equip., local device was moved to high priority state with oneself state, be consistent with the state of opposite equip..
But; Under non-reversing mode (Non-revertive mode); Include DNR (Do Not Revert; Irrevocable) and NR (No Request, non-request) two states, and the request signal under the NR state (Requested signal) is divided into two kinds of invalid signals (null signal) and standard signals (normal signal).When the local device of DNR state received that the opposite equip. state is the APS message of NR state, because the priority of DNR state is higher, so the state of local device remained unchanged; And generally, the local device of NR-null signal state is the APS message that can not receive the DNR state, therefore regulation not in the APS agreement.But in practical application, the local device that NR-null signal state may occur is received the situation of the APS message that the opposite equip. of DNR state sends; And this moment is owing to stipulate not in the APS agreement that therefore can the state of local device not handled, the NR state can remain unchanged; Cause the APS state of APS agreement terminal device inconsistent; And then the path that causes APS agreement terminal device to be selected is also inconsistent, and the data flow between terminal device will be interrupted, and can't carry out proper communication.
Summary of the invention
Main purpose of the present invention is that a kind of APS APS transferring protocol state method and device thereof that can the NR state be switched to the DNR state, guarantee proper communication is provided.
The present invention proposes a kind of APS APS transferring protocol state method, comprises step:
Receive the APS message of opposite equip. in the APS APS agreement;
From the information that said APS message carries, obtain the APS state of opposite equip.;
Obtain the APS state of local device;
The APS state of the opposite equip. that carries when said APS message is irrevocable DNR state; And the APS state of said local device is non-request NR state; And when the request signal of this NR state is invalid signals, be the DNR state by NR state transition with the APS state of said local device.
Preferably; The APS state of the said opposite equip. that carries when said APS message is irrevocable DNR state; And the APS state of said local device is non-request NR state; And when the request signal of this NR state is invalid signals, be that the DNR state specifically comprises by NR state transition with the APS state of said local device:
Whether the APS state of judging said opposite equip. is the DNR state;
When the APS of said opposite equip. state is the DNR state, the priority of the APS state of more said opposite equip. and local device.
Preferably; The APS state of the said opposite equip. that carries when said APS message is irrevocable DNR state; And the APS state of said local device is non-request NR state; And when the request signal of this NR state is invalid signals, be that the DNR state also specifically comprises by NR state transition with the APS state of said local device:
When the priority of the APS of said opposite equip. state is higher than the priority of APS state of local device, judge whether the APS state of said local device is the NR state;
When the APS of said local device state is the NR state, judge whether the request signal of this NR state is invalid signals;
When the request signal of said NR state is invalid signals, be the DNR state by NR state transition with the APS state of said local device.
Preferably, also comprise after the APS message of opposite equip. in the said reception APS APS agreement:
Whether the APS message of judging said opposite equip. is legal, if illegal, then abandons said APS message.
Preferably, said APS state with said local device is that the DNR state also comprises afterwards by NR state transition:
The operating path of said local device is switched to the protection path.
The present invention also proposes a kind of APS APS transferring protocol state device, comprising:
The message receiver module is used for receiving the APS message of APS APS agreement opposite equip.;
State acquisition module is used for obtaining from the information that said APS message carries the APS state of opposite equip.; Obtain the APS state of local device;
The state transition module; The APS state of the opposite equip. that is used for carrying when said APS message is irrevocable DNR state; And when the APS state of said local device is non-request NR state; And when the request signal of this NR state is invalid signals, be the DNR state by NR state transition with the APS state of said local device.
Preferably, said state transition module specifically is used for:
Whether the APS state of judging said opposite equip. is the DNR state;
When the APS of said opposite equip. state is the DNR state, the priority of the APS state of more said opposite equip. and local device.
Preferably, said state transition module also specifically is used for:
When the priority of the APS of said opposite equip. state is higher than the priority of APS state of local device, judge whether the APS state of said local device is the NR state;
When the APS of said local device state is the NR state, judge whether the request signal of this NR state is invalid signals;
When the request signal of said NR state is invalid signals, be the DNR state by NR state transition with the APS state of said local device.
Preferably, said message receiver module also is used for:
Whether the APS message of judging said opposite equip. is legal, if illegal, then abandons said APS message.
Preferably, said APS APS transferring protocol state device also comprises:
The path switching module is used for the operating path of said local device is switched to the protection path.
The present invention improves and replenishes the migration situation of NR state in the APS agreement; Receive these special circumstances of APS message of DNR status devices to the NR status devices; With NR state transition is the DNR state; Make the terminal device state consistency, guaranteed that APS agreement terminal device data flow do not interrupt, the communication of guaranteeing is normal.
Description of drawings
Fig. 1 is the flow chart of APS APS transferring protocol state method in one embodiment of the invention;
Fig. 2 is the flow chart of state transition step in the APS APS transferring protocol state method shown in Figure 1;
Fig. 3 is the flow chart of APS APS transferring protocol state method in another embodiment of the present invention, comprises the message validity determining step among this method embodiment;
Fig. 4 is the flow chart of APS APS transferring protocol state method in another embodiment of the present invention, comprises the path switching step among this method embodiment;
Fig. 5 is the structural representation of APS APS transferring protocol state device in one embodiment of the invention;
Fig. 6 is the structural representation of APS APS transferring protocol state device in another embodiment of the present invention, and this embodiment comprises the path switching module.
The realization of the object of the invention, functional characteristics and advantage will combine embodiment, further specify with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
As shown in Figure 1, Fig. 1 is the flow chart of APS APS transferring protocol state method in one embodiment of the invention, and the APS APS transferring protocol state method that the embodiment of the invention is mentioned comprises:
Step S10, the APS message of opposite equip. in the reception APS APS agreement;
In the present embodiment; Terminal device is sent the APS message to opposite equip. respectively in the APS APS agreement; Present embodiment is an example with an end wherein only; Through the APS protocol massages with the APS state advertisement of opposite equip. to local device, local device can consult to confirm the state of self according to the APS state of the opposite equip. in the APS message.
Step S20 obtains the APS state of opposite equip. from the information that the APS message carries;
In the present embodiment; Opposite equip. carries the APS state information of opposite equip. in the APS protocol massages that local device sends; Through the APS protocol massages with the APS state advertisement of opposite equip. to local device, local device can consult to confirm the state of self according to the APS state of the opposite equip. in the APS message.
Step S30 obtains the APS state of local device;
Step S40; The APS state of the opposite equip. that carries when the APS message is irrevocable DNR state; And the APS state of local device is non-request NR state, and the request signal of this NR state is when being invalid signals, is the DNR state with the APS state of local device by NR state transition.
Present embodiment is that the migration situation of NR state in the APS agreement is improved and replenished; Receive these special circumstances of APS message of DNR status devices to the NR status devices; Therefore need to judge whether the opposite equip. that sends the APS message is the DNR state; Need judge also simultaneously whether the local device that receives the DNR state message is the NR status devices, and the request signal of NR state is an invalid signals.Because the DNR priority of status is higher than the NR priority of status; Therefore keep the DNR state of high priority one end equipment constant; Only the NR state transition with low priority one end equipment is the DNR state; Make the terminal device state consistency, guaranteed that APS agreement terminal device data flow do not interrupt, the communication of guaranteeing is normal.
As shown in Figure 2, Fig. 2 is the flow chart of state transition step in the APS APS transferring protocol state method shown in Figure 1.Step S40 specifically comprises:
Step S41 judges whether the APS state of opposite equip. is the DNR state;
Step S42 when the APS of opposite equip. state is the DNR state, compares the priority of the APS state of opposite equip. and local device.
Present embodiment receives these special circumstances of APS message of DNR status devices especially to the NR status devices; Therefore, when the APS state of need opposite equip. is the DNR state, just carry out subsequent operation; Other states then no longer carry out subsequent operation; Directly jump out flow process, can practice thrift the judgement time, improve treatment effeciency.If the APS state of opposite equip. is not the DNR state, terminal device will be handled according to the regulation of APS agreement.If the APS state of opposite equip. is the DNR state, present embodiment is also according to the priority of each state of stipulating in the APS agreement, and the priority of the APS state of terminal device is differentiated.
Step S43 when the priority of the APS of opposite equip. state is higher than the priority of APS state of local device, judges whether the APS state of local device is the NR state;
Step S44 when the APS of local device state is the NR state, judges whether the request signal of this NR state is invalid signals;
After present embodiment received the APS message of DNR status devices to the NR status devices especially, the NR state was to these special circumstances of DNR state transition, therefore; When the APS state of need local device is the NR state; Just carry out subsequent operation, other states then no longer carry out subsequent operation, directly jump out flow process; Can practice thrift the judgement time, improve treatment effeciency.If the APS state of local device is not the NR state, terminal device will be handled according to the regulation of APS agreement.
Step S45 when the request signal of NR state is invalid signals, is the DNR state with the APS state of local device by NR state transition.
Present embodiment is after the equipment of invalid signals receives the APS message of DNR status devices to NR state and request signal only; The NR state is to these special circumstances of DNR state transition; When the request signal of the NR of local device state is invalid signals null signal, just carry out subsequent operation, if when the request signal of NR state is standard signal normal signal; Then directly jump out flow process, terminal device will be constant according to the regulation hold mode of APS agreement.
As shown in Figure 3, Fig. 3 is the flow chart of APS APS transferring protocol state method in another embodiment of the present invention, comprises the message validity determining step among this method embodiment.Also comprise after the step S10:
Step S11 judges whether the APS message of opposite equip. is legal, if illegal, then abandons the APS message.
In the present embodiment; Some APS message also carries other information, and for example device id, network connectivty etc. are because present embodiment is only to carrying APS agreement opposite equip. state; APS message for not carrying the opposite equip. state information will be judged to be illegal packet, should abandon.In addition; Some the time because network is unusual or other reasons, causing the APS message that receives not is the message that the corresponding APS agreement opposite equip. of local device sends; This moment can be illegal to this message through device id information Recognition in the APS message, need abandon.Present embodiment can avoid handling a large amount of junk information through the APS message validity is judged, effectively improves treatment effeciency.
As shown in Figure 4, Fig. 4 is the flow chart of APS APS transferring protocol state method in another embodiment of the present invention, comprises the path switching step among this method embodiment.Also comprise after the step S30:
Step S40 is switched to the protection path with the operating path of local device.
After present embodiment is the DNR state with the APS state of local device by NR state transition; Local device with the path switching of selecting to the protection path; The path that this moment, local device and opposite equip. were selected is the protection path; The terminal device data flow keeps clear and does not interrupt, and can carry out follow-up proper communication.Simultaneously, the APS state of local device and the APS state of opposite equip. are consistent, and are the DNR state, and according to APS agreement regulation, the state of terminal device can not move again, will remain on the DNR state, has guaranteed lasting proper communication.
As shown in Figure 5, Fig. 5 is the structural representation of APS APS transferring protocol state device in one embodiment of the invention, and the APS APS transferring protocol state device that the embodiment of the invention is mentioned comprises:
In the present embodiment, terminal device is sent the APS message to opposite equip. respectively in the APS APS agreement, receives the APS message through terminal device message receiver module 10 separately.Present embodiment is an example with an end wherein only; Message receiver module 10 receives the APS message that opposite equip. sends; Carry the APS state information of opposite equip. in the APS message; From the APS protocol massages, obtain the APS state of opposite equip. through state acquisition module 20, state acquisition module 20 is also obtained the APS state of local device simultaneously, and local device can consult to confirm the state of self according to the APS state of the opposite equip. in the APS message.Because present embodiment is that the migration situation of NR state in the APS agreement is improved and replenished; Receive these special circumstances of APS message of DNR status devices to the NR status devices; Therefore need to judge through state acquisition module 20 whether the opposite equip. that sends the APS message is the DNR state; State acquisition module 20 need judge also whether the local device that receives the DNR state message is the NR status devices simultaneously, and the request signal of NR state is an invalid signals.Because the DNR priority of status is higher than the NR priority of status; Therefore keep the DNR state of high priority one end equipment constant; Is the DNR state by the state transition module 30 of low priority one end equipment with the NR state transition of equipment of itself; Make the terminal device state consistency, guaranteed that APS agreement terminal device data flow do not interrupt, the communication of guaranteeing is normal.
In the embodiment of the invention, state transition module 30 specifically is used for:
Whether the APS state of judging opposite equip. is the DNR state;
When the APS of opposite equip. state is the DNR state, compare the priority of the APS state of opposite equip. and local device.
Present embodiment receives these special circumstances of APS message of DNR status devices especially to the NR status devices; Therefore; When needing the APS state of opposite equip. to be the DNR state, state acquisition module 20 is just carried out the compare operation of succeeding state priority, and the priority of status of local device and opposite equip. is compared; Be higher than local device for the priority of status of opposite equip. and just carry out the follow-up local device state of operation that obtains; Then no longer carry out subsequent operation for the APS state of opposite equip. for the priority of the APS state of other states or opposite equip. is lower than local device, can practice thrift the judgement time, improve treatment effeciency.If the APS state of opposite equip. is not the DNR state, terminal device will be handled according to the regulation of APS agreement.If the APS state of opposite equip. is the DNR state, state transition module 30 is also according to the priority of each state of stipulating in the APS agreement, and the priority of the APS state of terminal device is differentiated.
In the embodiment of the invention, state transition module 30 also specifically is used for:
When the priority of the APS of opposite equip. state is higher than the priority of APS state of local device, judge whether the APS state of local device is the NR state;
When the APS of local device state is the NR state, judge whether the request signal of this NR state is invalid signals;
When the request signal of NR state is invalid signals, be the DNR state by NR state transition with the APS state of local device.
Present embodiment is after the equipment of invalid signals receives the APS message of DNR status devices to NR state and request signal only; The NR state is to these special circumstances of DNR state transition, and therefore, state transition module 30 need at first be judged when the APS state of local device is the NR state; Just carry out subsequent request signal decision operation; When the request signal of the NR of local device state is invalid signals null signal, just carry out the succeeding state migration operation, if when the APS state of local device is not standard signal normal signal for the request signal of NR state or NR state; Then no longer carry out subsequent operation; Directly jump out flow process, can practice thrift the judgement time, improve treatment effeciency.
In the embodiment of the invention, message receiver module 10 also is used for:
Whether the APS message of judging opposite equip. is legal, if illegal, then abandons the APS message.
In the present embodiment; Some APS message also carries other information; For example device id, network connectivty etc.; Because only to carrying APS agreement opposite equip. state, message receiver module 10 will be judged to be illegal packet for the APS message that does not carry the opposite equip. state information to present embodiment, and abandon.In addition; Some the time because network is unusual or other reasons, causing the APS message that receives not is the message that the corresponding APS agreement opposite equip. of local device sends; Whether this moment can correct through device id information in the message receiver module 10 identification APS messages; As incorrect, judge that then this APS message is illegal, need abandon.Present embodiment can avoid handling a large amount of junk information through the APS message validity is judged, effectively improves treatment effeciency.
As shown in Figure 6, Fig. 6 is the structural representation of APS APS transferring protocol state device in another embodiment of the present invention, and the APS APS transferring protocol state device that this embodiment mentions also comprises:
After present embodiment is the DNR state with the APS state of local device by NR state transition; The path switching module 40 of local device with the path switching of selecting to the protection path; The path that this moment, local device and opposite equip. were selected is the protection path; The terminal device data flow keeps clear and does not interrupt, and can carry out follow-up proper communication.Simultaneously, the APS state of local device and the APS state of opposite equip. are consistent, and are the DNR state, and according to APS agreement regulation, the state of terminal device can not move again, will remain on the DNR state, has guaranteed lasting proper communication.
The above is merely the preferred embodiments of the present invention; Be not so limit claim of the present invention; Every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (10)
1. an APS APS transferring protocol state method is characterized in that, comprises step:
Receive the APS message of opposite equip. in the APS APS agreement;
From the information that said APS message carries, obtain the APS state of opposite equip.;
Obtain the APS state of local device;
The APS state of the opposite equip. that carries when said APS message is irrevocable DNR state; And the APS state of said local device is non-request NR state; And when the request signal of this NR state is invalid signals, be the DNR state by NR state transition with the APS state of said local device.
2. APS APS transferring protocol state method according to claim 1; It is characterized in that; The APS state of the said opposite equip. that carries when said APS message is irrevocable DNR state; And the APS state of said local device is non-request NR state, and the request signal of this NR state is when being invalid signals, is that the DNR state specifically comprises with the APS state of said local device by NR state transition:
Whether the APS state of judging said opposite equip. is the DNR state;
When the APS of said opposite equip. state is the DNR state, the priority of the APS state of more said opposite equip. and local device.
3. APS APS transferring protocol state method according to claim 2 is characterized in that, and is said when the APS of said opposite equip. state is the DNR state, also comprises after the priority of the APS state of more said opposite equip. and local device:
When the priority of the APS of said opposite equip. state is higher than the priority of APS state of local device, judge whether the APS state of said local device is the NR state;
When the APS of said local device state is the NR state, judge whether the request signal of this NR state is invalid signals;
When the request signal of said NR state is invalid signals, be the DNR state by NR state transition with the APS state of said local device.
4. APS APS transferring protocol state method according to claim 1 is characterized in that, also comprises after the APS message of opposite equip. in the said reception APS APS agreement:
Whether the APS message of judging said opposite equip. is legal, if illegal, then abandons said APS message.
5. according to claim 1 or 3 described APS APS transferring protocol state methods, it is characterized in that said APS state with said local device is that the DNR state also comprises afterwards by NR state transition:
The operating path of said local device is switched to the protection path.
6. an APS APS transferring protocol state device is characterized in that, comprising:
The message receiver module is used for receiving the APS message of APS APS agreement opposite equip.;
State acquisition module is used for obtaining from the information that said APS message carries the APS state of opposite equip.; Obtain the APS state of local device;
The state transition module; The APS state of the opposite equip. that is used for carrying when said APS message is irrevocable DNR state; And when the APS state of said local device is non-request NR state; And when the request signal of this NR state is invalid signals, be the DNR state by NR state transition with the APS state of said local device.
7. APS APS transferring protocol state device according to claim 6 is characterized in that said state transition module specifically is used for:
Whether the APS state of judging said opposite equip. is the DNR state;
When the APS of said opposite equip. state is the DNR state, the priority of the APS state of more said opposite equip. and local device.
8. APS APS transferring protocol state device according to claim 7 is characterized in that said state transition module also specifically is used for:
When the priority of the APS of said opposite equip. state is higher than the priority of APS state of local device, judge whether the APS state of said local device is the NR state;
When the APS of said local device state is the NR state, judge whether the request signal of this NR state is invalid signals;
When the request signal of said NR state is invalid signals, be the DNR state by NR state transition with the APS state of said local device.
9. APS APS transferring protocol state device according to claim 6 is characterized in that said message receiver module also is used for:
Whether the APS message of judging said opposite equip. is legal, if illegal, then abandons said APS message.
10. according to claim 6 or 8 described APS APS transferring protocol state devices, it is characterized in that, also comprise:
The path switching module is used for the operating path of said local device is switched to the protection path.
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| CN105227339B (en) * | 2014-07-02 | 2019-11-12 | 南京中兴新软件有限责任公司 | Automatic protection switching APS condition processing method, device and APS node |
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